man db2bak (8): Directory Server script for making a backup of the database

SYNOPSIS

db2bak [archivedir] [-Z serverID] [-q] [-h]

Creates a backup of the database. This script can be executed while the server is running or stopped.

A summary of options is included below:

archivedir: The full path to the directory to store the backup.
-Z Server Identifier: The server ID of the Directory Server instance. If there is only one instance on the system, this option can be skipped.
-q: Quiet mode. Reduces output of task.
-h: Display the usage.

db2bak -Z instance2: Makes a backup of the entire database for 'instance2', and stores it in the default server instance backup directory.
db2bak /LDAP/backups/20130305: Creates a backup of the database and stores it in specified location.

Exit status is zero if no errors occur. Errors result in a non-zero exit status and a diagnostic message being written to standard error.